In my Angular-11, I have this Javascript file:
"node_modules/admin-lte/plugins/bs-stepper/js/bs-stepper.min.js",
I added it to angular.json as shown above.
import Stepper from '...';
#Component({
selector: 'app-profile',
templateUrl: './profile.component.html',
styleUrls: ['./profile.component.css']
})
export class ProfileComponent implements OnInit {
name = 'Angular';
private stepper: Stepper;
next() {
this.stepper.next();
}
onSubmit() {
return false;
}
ngOnInit() {
this.stepper = new Stepper(document.querySelector('#stepper1'), {
linear: false,
animation: true
})
}
}
How do I import it into this component: profile.component.ts this way,
import Stepper from '...';
from the Javascript path
Thanks
You must first declare it in typing.d.ts and include angular.json script.
in angular.json
{
"build" : {
"scripts" : [
"node_modules/admin-lte/plugins/bs-stepper/js/bs-stepper.min.js",
....
]
in typing.d.ts
declare module 'admin-lte/plugins/bs-stepper/js/bs-stepper.min';
Note : If this is a JQuery package then you need to create an interface.
declare module 'jquery';
interface JQuery {
Stepper(DOM : any, options?: any): any;
}
finally you can now call it in the component.
in component
import Stepper from 'admin-lte/plugins/bs-stepper/js/bs-stepper.min';
Edit : Create a file named typing.d.ts inside the src folder. then add
/// <reference path = "typings.d.ts" />
to the top of the src/main.ts file
As it happens there is a NPM package for bs-stepper that could be used out-of-the-box with Angular.
1. Install the package
From the project root folder, run the command
npm install bs-stepper --save
Also install bootstrap if needed
npm install bootstrap --save
2. Import the CSS
styles.css
#import '~bs-stepper/dist/css/bs-stepper.min.css';
/* Also import bootstrap if needed */
#import '~bs-stepper/dist/css/bs-stepper.min.css';
3. Use ViewChild instead of querySelector
Using document.querySelector in an Angular app would search the entire DOM whereas the element would only be present in the current component. Based on the size of the app it might incur a performance issue. Instead you could use the #ViewChild decorator with with a template reference variable
Template (*.html)
<!-- Here, `bsStepper` is the template reference variable -->
<div #bsStepper id="stepper1" class="bs-stepper">
...
</div>
Component (*.ts)
import { Component, AfterViewInit, ViewChild, ElementRef } from '#angular/core';
import Stepper from 'bs-stepper';
#Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements AfterViewInit {
#ViewChild('bsStepper', { static: false }) stepperElement!: ElementRef<any>;
public stepper!: Stepper;
next() {
this.stepper.next();
}
onSubmit() {
return false;
}
ngAfterViewInit() {
this.stepper = new Stepper(this.stepperElement.nativeElement, {
linear: false,
animation: true
});
}
}
Working example: Stackblitz
My intention is to add a javascript plugin, namely this one:
https://steven.codes/typerjs/
So far, my approach was to add its JS file in my assets folder and added the path to angular.json.
"scripts": [
"node_modules/jquery/dist/jquery.min.js",
"src/assets/js/typer.js"
]
My next step was to declare a var in the component and to try to call it in ngOnInit().
import {Component, OnInit} from '#angular/core';
import * as AOS from 'aos';
declare var Typer: any;
#Component({
selector: 'app-background',
templateUrl: './background.component.html',
styleUrls: ['./background.component.scss']
})
export class BackgroundComponent implements OnInit {
rotate = false;
constructor() { }
ngOnInit() {
this.rotate = !this.rotate;
AOS.init();
Typer.init();
}
}
I don't get any errors, but it's not working. Does somebody know a working approach?
There are multiple options that may help.
First - Node style require:
var typer = require("typer");
Second one use it like you already did with aos:
import * as typer from 'typer';
In this case you must be sure that your .js lib can be found. You have added it to angular.js so that should works.
In both cases the initialization should be the same:
ngOnInit() {
this.rotate = !this.rotate;
AOS.init();
typer.init();
}
I am new to angular 6. I just start learning angular 6. While creating a project i am stuck into error.
I am simply adding external scripts into my component and getting error
Here is my code
import { Component, OnInit } from '#angular/core';
import * as $ from 'src/assets/js/jquery-3.2.1.min.js';
import 'src/assets/js/countdowntime.js';
#Component({
selector: 'app-comingsoon',
templateUrl: './comingsoon.component.html',
styleUrls: ['./comingsoon.component.css']
})
export class ComingsoonComponent implements OnInit {
constructor() { }
ngOnInit() {
console.log($) // here is am getting output
}
}
Error:
Uncaught ReferenceError: jQuery is not defined at Object..
/src/assets/js/countdowntime.js (countdowntime.js:92)
Update your code
Add jQuery to your index.html or angular.json file
import { Component, OnInit } from '#angular/core';
declare var jQuery:any;
#Component({
selector: 'app-comingsoon',
templateUrl: './comingsoon.component.html',
styleUrls: ['./comingsoon.component.css']
})
export class ComingsoonComponent implements OnInit {
constructor() {
// load countdown
var c = document.createElement("script");
c.type = "text/javascript";
c.src = "src/assets/js/countdowntime.js";
document.getElementsByTagName("head")[0].appendChild(c);
}
ngOnInit() {
console.log(jQuery) // here is am getting output
}
}
You should be able to add jquery as a package and reference it in your component code, so it can get picked up by Webpack:
$ npm add jquery
Then inside your TypeScript code:
import * as $ from 'jquery';
...
export class FooComponent implements OnInit {
ngOnInit() {
console.log($);
}
}
Solution 1 :
Use Jquery types
Need to add types for jquery version.
you can find jquery types here
https://www.npmjs.com/package/#types/jquery
As typescript is strongly typed
For all items which we use in a component should have types
Solution 2 :
create a variable $ and assign its type to any
A workaround if you're not able to find type for the current jquery version which is
declare var $: any;
#Component({
selector: 'app-comingsoon',
templateUrl: './comingsoon.component.html',
styleUrls: ['./comingsoon.component.css']
})
inside your component life cycle check the value of the dollar, you will find jquery properties and method. Your error will be resolved
ngOnInit() {
console.log($)
}
I am new to Angular and Materialize. I am trying to initialize a carousel within my Angular component.
Materialize mentions three ways:
M.AutoInit();
or
document.addEventListener('DOMContentLoaded', function() {
var elems = document.querySelectorAll('.carousel');
var instances = M.Carousel.init(elems, options);
});
or
$(document).ready(function(){
$('.carousel').carousel();
});
I have installed Materialize via node. I have both its CSS and JS as dependencies in my angular.json folder. The CSS styling works. I have tried these three methods within my ngOnInit lifecycle hook within my component. "M" is not recognized. I tried importing materialize:
import { materialize } from '../../../node_modules/materialize-css'
and
let m = materialize;
But this hasn't worked either.
I then installed jquery as a depedency and tried that method, but that doesn't seem to work either.
You should use the Materialize for Angular library. Asking how to use jQuery with Angular can get you a lot of downvotes.
https://www.npmjs.com/package/angular2-materialize
import OnInit from #angular/core library
declare const M: any; underneath imports
fire the M.AutoInit() function in ngOnInit() lifecycle hook
Example (where the component name is MediaComponent):
import { Component, OnInit } from '#angular/core';
declare const M: any;
#Component({
selector: 'app-media',
templateUrl: './media.component.html',
styleUrls: ['./media.component.scss']
})
export class MediaComponent implements OnInit {
constructor() { }
ngOnInit() {
M.AutoInit();
}
}
import { Component, OnInit } from '#angular/core';
declare var M: any;
I want to manually compile some HTML containing directives. What is the equivalent of $compile in Angular 2?
For example, in Angular 1, I could dynamically compile a fragment of HTML and append it to the DOM:
var e = angular.element('<div directive></div>');
element.append(e);
$compile(e)($scope);
Angular 2.3.0 (2016-12-07)
To get all the details check:
How can I use/create dynamic template to compile dynamic Component with Angular 2.0?
To see that in action:
observe a working plunker (working with 2.3.0+)
The principals:
1) Create Template
2) Create Component
3) Create Module
4) Compile Module
5) Create (and cache) ComponentFactory
6) use Target to create an Instance of it
A quick overview how to create a Component
createNewComponent (tmpl:string) {
#Component({
selector: 'dynamic-component',
template: tmpl,
})
class CustomDynamicComponent implements IHaveDynamicData {
#Input() public entity: any;
};
// a component for this particular template
return CustomDynamicComponent;
}
A way how to inject component into NgModule
createComponentModule (componentType: any) {
#NgModule({
imports: [
PartsModule, // there are 'text-editor', 'string-editor'...
],
declarations: [
componentType
],
})
class RuntimeComponentModule
{
}
// a module for just this Type
return RuntimeComponentModule;
}
A code snippet how to create a ComponentFactory (and cache it)
public createComponentFactory(template: string)
: Promise<ComponentFactory<IHaveDynamicData>> {
let factory = this._cacheOfFactories[template];
if (factory) {
console.log("Module and Type are returned from cache")
return new Promise((resolve) => {
resolve(factory);
});
}
// unknown template ... let's create a Type for it
let type = this.createNewComponent(template);
let module = this.createComponentModule(type);
return new Promise((resolve) => {
this.compiler
.compileModuleAndAllComponentsAsync(module)
.then((moduleWithFactories) =>
{
factory = _.find(moduleWithFactories.componentFactories
, { componentType: type });
this._cacheOfFactories[template] = factory;
resolve(factory);
});
});
}
A code snippet how to use the above result
// here we get Factory (just compiled or from cache)
this.typeBuilder
.createComponentFactory(template)
.then((factory: ComponentFactory<IHaveDynamicData>) =>
{
// Target will instantiate and inject component (we'll keep reference to it)
this.componentRef = this
.dynamicComponentTarget
.createComponent(factory);
// let's inject #Inputs to component instance
let component = this.componentRef.instance;
component.entity = this.entity;
//...
});
The full description with all the details read here, or observe working example
.
.
OBSOLETE - Angular 2.0 RC5 related (RC5 only)
to see previous solutions for previous RC versions, please, search through the history of this post
Note: As #BennyBottema mentions in a comment, DynamicComponentLoader is now deprecated, hence so is this answer.
Angular2 doesn't have any $compile equivalent. You can use DynamicComoponentLoader and hack with ES6 classes to compile your code dynamically (see this plunk):
import {Component, DynamicComponentLoader, ElementRef, OnInit} from 'angular2/core'
function compileToComponent(template, directives) {
#Component({
selector: 'fake',
template , directives
})
class FakeComponent {};
return FakeComponent;
}
#Component({
selector: 'hello',
template: '<h1>Hello, Angular!</h1>'
})
class Hello {}
#Component({
selector: 'my-app',
template: '<div #container></div>',
})
export class App implements OnInit {
constructor(
private loader: DynamicComponentLoader,
private elementRef: ElementRef,
) {}
ngOnInit() {} {
const someDynamicHtml = `<hello></hello><h2>${Date.now()}</h2>`;
this.loader.loadIntoLocation(
compileToComponent(someDynamicHtml, [Hello])
this.elementRef,
'container'
);
}
}
But it will work only until html parser is inside angular2 core.
Angular Version I have Used - Angular 4.2.0
Angular 4 is came up with ComponentFactoryResolver to load components at runtime. This is a kind of same implementation of $compile in Angular 1.0 which serves your need
In this below example I am loading ImageWidget component dynamically in to a DashboardTileComponent
In order to load a component you need a directive that you can apply to ng-template which will helps to place the dynamic component
WidgetHostDirective
import { Directive, ViewContainerRef } from '#angular/core';
#Directive({
selector: '[widget-host]',
})
export class DashboardTileWidgetHostDirective {
constructor(public viewContainerRef: ViewContainerRef) {
}
}
this directive injects ViewContainerRef to gain access to the view container of the element that will host the dynamically added component.
DashboardTileComponent(Place holder component to render the dynamic component)
This component accepts an input which is coming from a parent components or you can load from your service based on your implementation. This component is doing the major role to resolve the components at runtime. In this method you can also see a method named renderComponent() which ultimately loads the component name from a service and resolve with ComponentFactoryResolver and finally setting data to the dynamic component.
import { Component, Input, OnInit, AfterViewInit, ViewChild, ComponentFactoryResolver, OnDestroy } from '#angular/core';
import { DashboardTileWidgetHostDirective } from './DashbardWidgetHost.Directive';
import { TileModel } from './Tile.Model';
import { WidgetComponentService } from "./WidgetComponent.Service";
#Component({
selector: 'dashboard-tile',
templateUrl: 'app/tile/DashboardTile.Template.html'
})
export class DashboardTileComponent implements OnInit {
#Input() tile: any;
#ViewChild(DashboardTileWidgetHostDirective) widgetHost: DashboardTileWidgetHostDirective;
constructor(private _componentFactoryResolver: ComponentFactoryResolver,private widgetComponentService:WidgetComponentService) {
}
ngOnInit() {
}
ngAfterViewInit() {
this.renderComponents();
}
renderComponents() {
let component=this.widgetComponentService.getComponent(this.tile.componentName);
let componentFactory = this._componentFactoryResolver.resolveComponentFactory(component);
let viewContainerRef = this.widgetHost.viewContainerRef;
let componentRef = viewContainerRef.createComponent(componentFactory);
(<TileModel>componentRef.instance).data = this.tile;
}
}
DashboardTileComponent.html
<div class="col-md-2 col-lg-2 col-sm-2 col-default-margin col-default">
<ng-template widget-host></ng-template>
</div>
WidgetComponentService
This is a service factory to register all the components that you want to resolve dynamically
import { Injectable } from '#angular/core';
import { ImageTextWidgetComponent } from "../templates/ImageTextWidget.Component";
#Injectable()
export class WidgetComponentService {
getComponent(componentName:string) {
if(componentName==="ImageTextWidgetComponent"){
return ImageTextWidgetComponent
}
}
}
ImageTextWidgetComponent(component we are loading at runtime)
import { Component, OnInit, Input } from '#angular/core';
#Component({
selector: 'dashboard-imagetextwidget',
templateUrl: 'app/templates/ImageTextWidget.html'
})
export class ImageTextWidgetComponent implements OnInit {
#Input() data: any;
constructor() { }
ngOnInit() { }
}
Add Finally add this ImageTextWidgetComponent in to your app module as entryComponent
#NgModule({
imports: [BrowserModule],
providers: [WidgetComponentService],
declarations: [
MainApplicationComponent,
DashboardHostComponent,
DashboardGroupComponent,
DashboardTileComponent,
DashboardTileWidgetHostDirective,
ImageTextWidgetComponent
],
exports: [],
entryComponents: [ImageTextWidgetComponent],
bootstrap: [MainApplicationComponent]
})
export class DashboardModule {
constructor() {
}
}
TileModel
export interface TileModel {
data: any;
}
Orginal Reference from my blog
Official Documentation
Download Sample Source Code
this npm package made it easier for me:
https://www.npmjs.com/package/ngx-dynamic-template
usage:
<ng-template dynamic-template
[template]="'some value:{{param1}}, and some component <lazy-component></lazy-component>'"
[context]="{param1:'value1'}"
[extraModules]="[someDynamicModule]"></ng-template>
In order to dinamically create an instance of a component and attach it to your DOM you can use the following script and should work in Angular RC:
html template:
<div>
<div id="container"></div>
<button (click)="viewMeteo()">Meteo</button>
<button (click)="viewStats()">Stats</button>
</div>
Loader component
import { Component, DynamicComponentLoader, ElementRef, Injector } from '#angular/core';
import { WidgetMeteoComponent } from './widget-meteo';
import { WidgetStatComponent } from './widget-stat';
#Component({
moduleId: module.id,
selector: 'widget-loader',
templateUrl: 'widget-loader.html',
})
export class WidgetLoaderComponent {
constructor( elementRef: ElementRef,
public dcl:DynamicComponentLoader,
public injector: Injector) { }
viewMeteo() {
this.dcl.loadAsRoot(WidgetMeteoComponent, '#container', this.injector);
}
viewStats() {
this.dcl.loadAsRoot(WidgetStatComponent, '#container', this.injector);
}
}
Angular TypeScript/ES6 (Angular 2+)
Works with AOT + JIT at once together.
I created how to use it here:
https://github.com/patrikx3/angular-compile
npm install p3x-angular-compile
Component: Should have a context and some html data...
Html:
<div [p3x-compile]="data" [p3x-compile-context]="ctx">loading ...</div>
You can see the component, that allow to compile simple dynamic Angular components https://www.npmjs.com/package/#codehint-ng/html-compiler
I know this issue is old, but I spent weeks trying to figure out how to make this work with AOT enabled. I was able to compile an object but never able to execute existing components. Well I finally decided to change tact, as I was't looking to compile code so much as execute a custom template. My thought was to add the html which anyone can do and loop though the existing factories. In doing so I can search for the element/attribute/etc. names and execute the component on that HTMLElement. I was able to get it working and figured I should share this to save someone else the immense amount of time I wasted on it.
#Component({
selector: "compile",
template: "",
inputs: ["html"]
})
export class CompileHtmlComponent implements OnDestroy {
constructor(
private content: ViewContainerRef,
private injector: Injector,
private ngModRef: NgModuleRef<any>
) { }
ngOnDestroy() {
this.DestroyComponents();
}
private _ComponentRefCollection: any[] = null;
private _Html: string;
get Html(): string {
return this._Html;
}
#Input("html") set Html(val: string) {
// recompile when the html value is set
this._Html = (val || "") + "";
this.TemplateHTMLCompile(this._Html);
}
private DestroyComponents() { // we need to remove the components we compiled
if (this._ComponentRefCollection) {
this._ComponentRefCollection.forEach((c) => {
c.destroy();
});
}
this._ComponentRefCollection = new Array();
}
private TemplateHTMLCompile(html) {
this.DestroyComponents();
this.content.element.nativeElement.innerHTML = html;
var ref = this.content.element.nativeElement;
var factories = (this.ngModRef.componentFactoryResolver as any)._factories;
// here we loop though the factories, find the element based on the selector
factories.forEach((comp: ComponentFactory<unknown>) => {
var list = ref.querySelectorAll(comp.selector);
list.forEach((item) => {
var parent = item.parentNode;
var next = item.nextSibling;
var ngContentNodes: any[][] = new Array(); // this is for the viewchild/viewchildren of this object
comp.ngContentSelectors.forEach((sel) => {
var ngContentList: any[] = new Array();
if (sel == "*") // all children;
{
item.childNodes.forEach((c) => {
ngContentList.push(c);
});
}
else {
var selList = item.querySelectorAll(sel);
selList.forEach((l) => {
ngContentList.push(l);
});
}
ngContentNodes.push(ngContentList);
});
// here is where we compile the factory based on the node we have
let component = comp.create(this.injector, ngContentNodes, item, this.ngModRef);
this._ComponentRefCollection.push(component); // save for our destroy call
// we need to move the newly compiled element, as it was appended to this components html
if (next) parent.insertBefore(component.location.nativeElement, next);
else parent.appendChild(component.location.nativeElement);
component.hostView.detectChanges(); // tell the component to detectchanges
});
});
}
}
If you want to inject html code use directive
<div [innerHtml]="htmlVar"></div>
If you want to load whole component in some place, use DynamicComponentLoader:
https://angular.io/docs/ts/latest/api/core/DynamicComponentLoader-class.html